SHELL PROCESSING SUPPORT FORMAT
FOR 3D SURVEYS
AS ADOPTED BY THE SEG IN 1993
SEG TECHNICAL STANDARDS COMMITTEE
Rev 2.1
The revisions to this document allow this format to conform to the new
SEGD Rev 2.1 SEG Field Tape Standards as revised Jan, 2006.
Shell Internationale Petroleum Maatschappij B.V., The Hague,
The Netherlands
SPS FORMAT
CONTENTS
INTRODUCTION ....................................................................................................................................................... 1
Controlling organization ...........................................................................................................................................2
FIELD SYSTEM ......................................................................................................................................................... 2
SHELL PROCESSING SUPPORT FORMAT FOR 3D SURVEYS.................................................................. 5
GENERAL................................................................................................................................................................ 5
Data record specification ................................................................................................................................... 5
Data record sorting order................................................................................................................................... 5
Format for survey data on 9-track tape ............................................................................................................. 5
Format for survey data on floppy disc ............................................................................................................... 6
HEADER RECORD SPECIFICATION................................................................................................................. 6
Instrument code (I) tables ................................................................................................................................... 7
Receiver code (Rx) tables.................................................................................................................................... 8
Source code (Sx) tables. ...................................................................................................................................... 8
Quality Control check records ........................................................................................................................... 9
POINT RECORD SPECIFICATION ................................................................................................................... 10
RELATION RECORD SPECIFICATION........................................................................................................... 11
COMMENT RECORD SPECIFICATION (O PTIONAL) ..................................................................................... 12
HEADER RECORD DESCRIPTION .................................................................................................................. 13
Seismic instrument header records .................................................................................................................. 16
Seismic receiver header records ...................................................................................................................... 17
Seismic source header records ......................................................................................................................... 18
Quality Control check records ......................................................................................................................... 19
POINT RECORD DESCRIPTION ....................................................................................................................... 20
RELATION RECORD DESCRIPTION .............................................................................................................. 23
APPENDIX 1 - EXAMPLE OF SPS FORMAT................................................................................................... 25
R FILE..................................................................................................................................................................... 25
S FILE ..................................................................................................................................................................... 28
X FILE .................................................................................................................................................................... 30
LIST OF FIGURES
FIGURE 1 FIELD ACQUISITION MANAGEMENT SYSTEM ............................................................................................... 3
FIGURE 2 AUTOMATIC RECORDING ............................................................................................................................... 4
FIGURE 3 LAND ELEVATIONS ...................................................................................................................................... 21
FIGURE 4 TIDAL ELEVATIONS ...................................................................................................................................... 22
ii
INTRODUCTION
The purpose of the format is to establish a common standard for the transfer of positioning
and geophysical support data from 3D field crews to seismic processing centers. The
format can also be used for other types of seismic surveys.
With the growth and increased complexity of land 3D surveys there was a need to
establish a robust and standard procedure for logging, during acquisition, the positioning
and geophysical spread relation data in a way that reduces errors, allows the field crews to
quality control the data, and hence detect and correct errors before the data was transferred
to the seismic processing centers.
Quality control was carried out as the first stage in the processing centers. Experience has
shown that most errors are only detected when the geophysical and coordinate information
are integrated, and that often spread relation errors could not be corrected, leading to the
deletion of otherwise good quality records.
Providing the processing centers with checked data in a standard format, containing all
relevant field data significantly reduced the time spent by the processing centers on initial
quality control and increased the quality of the end products.
Comments on Revision 2.1
Recently, advances in acquisition technology and improvements in cost efficiencies have
greatly increased the volume of data, in terms of channel counts, source/receiver densities,
and surface area. This increase in the shear number of elements to account for has led to a
situation where both the SEGD and the SPS formats can no longer adequately reflect the
positioning and geophysical spread relation data. This was partially addressed in Revision
2.0 of the SEGD format, but was not reflected in an update to the SPS. To this end, this
revision (2.1) to the SPS format has been undertaken in conjunction with Revision 2.1 of
the SEGD format and has been named accordingly (in the absence of a revision 2.0 of the
SPS).
It is the intent of this revision to act as a stop gap measure to meet the immediate needs of
the community. To that end, the original text and formats have been left unchanged
unless a clear need has been seen to make changes. Modifications to the format itself
have been limited to address the pressing needs of current acquisition, and to encompass
the likewise limited changes made to the SEGD format in Revisions 2.0 and 2.1. Although
it was agreed by the SEG Technical Standards Committee that future SEG standards
would use and revisions where possible would be compatible with the EPSG Geodetic
Database (now part of OGP) this minor revision will not include this standard. Adoption
of the EPSG Geodetic Database compatibility has been left for the next major SEGD/SPS
Rev 3 document release.
Summary of Changes to the SPS Format for Revision 2.1
The following list discusses some of the specific changes of Revision 2.1.
1) Addition of a line sequence number which will allow more than one production
line per tape to be recorded as long as a unique combination of field file number
and line sequence number are used per storage unit. See pages 7,13.
1
2) Point Record Specification table values and descriptions were modified to
accommodate updated formats, defaults, justification and min/max units in
keeping with SEGD Revision 2.1. Some header records will be rendered redundant
or obsolete with new format, ie; H31 Line number format. See page 7.
3) Relation Record Specification table value and descriptions were modified to
accommodate larger field record numbers, value changes on from and to channel
items and updating formats, default values, justification and columnar entries in
keeping with SEGD Revision 2.1. See page 11.
4) Geodetic datum updated to reflect WGS84 vs WGS72. See page 14.
5) Reference to UKOOA P1/84 updated to UKOOA P1/90. See page 21.
6) Appendix 1- Example of SPS Format, R, S, and X files updated to reflect changes
to new Revision 2.1 format. See page 25-32.
Controlling Organization
The SPS rev 2.1 is administered by the SEG Technical Standards Committee. Any
questions, corrections or problems encountered in the format should be addressed to:
Society of Exploration Geophysicists
P.O. Box 702740
Tulsa, Ok 74170-2740
Attention: SEG Technical Standards Committee
Phone: (918) 497-5500
Fax:
(918) 497-5557
Internet site: www.seg.org
FIELD SYSTEM
The field crews must have an acquisition management system to generate the SPS format
during the survey. Errors will be reduced both during recording and during the generation
of the SPS format if automated procedures are introduced at survey set-up and during
daily recording. Figure 1 shows the main elements of such a system; The Field Database,
Topographical computations and 3D recording management are the minimum elements
required to support the generation of the SPS format.
2
FIELD OPERATIONS
Shooting
Direct data flow of
instructions
direct to
observer reports,
recorder
data, etc.
refraction and topo
3D survey
planning
3D recording
management
FIELD DATABASE
field static
PC/WORKSTATION
computations
topographical
computations
All ancillary
data in standard
exchange format
equipment
QC
PROCESSING CENTRE
seismic data
processing
Figure 1 Field Acquisition Management System
A direct link to and from the seismic recording instrument is strongly recommended. The
I/O System One, SN368 + LXU and the new MDS18X have this capability. Seismic
recording systems that do not have this can be modified to provide partial automation.
Figure 2 shows the preferred method of data exchange between the system and the seismic
recording instrument.
3
AUTOMATIC RECORDING
RECORDING
DATABASE
shooting
instructions
Automatic
Pre Planning
planned spread
Spread Computation
INSTRUMENT
Recording
relationship
Automatic
Updating
Logging
Preparation Standard
observer report
Exchange Format
Recording Time
SPS
Data Disk
Tape Number
Seismic
Rec Number
Actual Spread
Data Tape
Relationship
Figure 2 Automatic recording
The key information required to relate the seismic records and the corresponding
positioning and geophysical support data is written in the seismic headers and in SPS.
4
SHELL PROCESSING SUPPORT FORMAT FOR 3D SURVEYS
Name: SPS format
GENERAL
Coordinates and elevations of geophysical lines may be determined by interpolation between
observed break points in the line. The point files contains coordinates and elevations of all
geophysical points (observed and interpolated) and of all permanent markers. The shotpoint
and relational files are to be sorted chronologically, and the receiver file is to be sorted in
ascending sequence of line, point and point index numbers.
In order to avoid ambiguities each physical position in the field (shotpoint or receiver group)
must have a unique name.
Data record specification
The data set consists of three files with an optional fourth comment file, each with an
identical block of header records. For magnetic tapes each file is terminated by a record
containing "EOF" in col. 1-3
First file
: Receiver File. "Point Records" with details of receiver groups or
permanent markers.
Second File : Source File.
"Point Records" with details of shotpoints (power
source).
Third File : Cross-Reference File "Relation Records" specifying for each shotpoint its
record number and the relation between recording
channel numbers and receiver groups
Optional
: Comment File. "Comments" with details of the observers report.
Data record sorting order
Receiver File
Source File
Cross-Reference File
Sort fields and sorting order.
: 'R' records. Line name, Point number, Point index
: 'S' records. Julian day and Time of recording shotpoint
: 'X'records. Sorted in the same order as the Source File.
Legacy Format for survey data on 9-track tape
Tape specifications and tape layout
Half-inch magnetic tape : IBM compatible, non-label.
Number of tracks : 9. Number of bytes per inch : 6250 (1600 is a permissible alternative).
Mode : EBCDIC coded. Record length : 80 bytes.
Block size : 1600 bytes (20 logical records). Physically separated by inter-record gap.
An "EOF" statement followed by an IBM tape mark shall be written after the end of a file and
a tape shall be closed by two IBM tape marks.
In general, a tape may contain one or more files depending on the type of survey. Each file
shall start with a number of 'Header Records' followed by 'Data Records' and closed by an
EOF statement and an IBM tape mark.
5
Legacy Format for survey data on floppy disc
Disc specifications and layout
Format: MS-DOS compatible ASCII files.
Record length : 80 bytes, followed by carriage return (col 81) and line feed (col 82).
3.5" or 5.25" formatted disc (any size: 360/720 Kbyte or 1.4/1.2 Mbyte). File name to relate
to the project, date and sequence. To denote file type the file extension name must be prefixed
with: 'S' for shotpoint recordsegPRJX90.S01
'R' for receiver records
PRJX90.R01
'X' for relational records
PRJX90.X01
'C' for comment records
PRJX90.C01
In general, a disc may contain one or more files depending on the type of survey. Each file
shall start with a number of 'Header Records' followed by 'Data Records'.
HEADER RECORD SPECIFICATION
Each file shall start with a number of header records which contain information about, and
parameters controlling, all the data records which follow.
The general format for a header record shall be:
a.
b.
c.
d.
e.
Cols
1
2-3
4
5-32
33-80
Record identifier "H"
Header record type
Header record type modifier
Parameter description
Parameter data
Format
A1
I2
I1
7A4
See below
Header records types H0 to H20 are mandatory for all surveys even if a "N/A" entry is
required ("N/A" is not allowed for H18). Header records of types H21 to H25 are mandatory
as far as they are applicable to the projection used.
Requirements for projection definition include the following header records:
Transverse Mercator
UTM
Stereographic
Oblique Mercator
Lambert Conical
: H220, H231, H232, H241, H242
: H19, H220
: H231, H232, H241, H242
: H231, H232, H241, H242, H259 and H256 or H257 or H258
: H210, H220, H231, H232, H241, H242
Header record type H26 is a free format statement for any other relevant information.
Formats of parameter data fields for each of the header record types shall be:
Type
H00
H01
H02
Parameter description
Pos: 5-32
SPS format version num.
Description of survey area
Date of survey
Parameters
Pos
Format
33-80
12A4
33-80
12A4
33-80
12A4
6
H021
H022
H023
H03
H04
H05
H06
H07
H08
H09
H10
H11
H12
H13
H14
H15
H16
H17
H18
H19
H20
H201
H210
H220
H231
H232
H241
H242
H256
H257
H258
H259
Post-plot date of issue
Tape/disk identifier
Line sequence number
Client
Geophysical contractor
Positioning contractor
Pos. proc. contractor
Field computer system(s)
Coordinate location
Offset from coord. location
Clock time w.r.t. GMT
Spare
Geodetic datum,-spheroid
Spare
Geodetic datum parameters
Spare
Spare
Vertical datum description
Projection type
Projection zone
Description of grid units
Factor to meter
Lat. of standard parallel(s)
Long. of central meridian
Grid origin
Grid coord. at origin
Scale factor
Lat., long. scale factor
Lat., long. initial line
Circular bearing of H256
Quadrant bearing of H256
Angle from skew
33-80
33-80
33-80
33-80
33-80
33-80
33-80
33-80
33-80
33-80
33-80
33-80
33-80
33-80
33-80
33-80
33-80
33-80
33-80
33-80
33-56
33-46
33-56
33-44
33-56
33-56
33-44
33-56
33-56
33-44
33-44
33-44
H26
Any other relevant information
5-80
This record can be repeated as required.
19A4
H30
H31
Project code and description
Line number format (Obsolete)
3A2,10A4
12A4
33-78
33-80
12A4
12A4
I5
12A4
12A4
12A4
12A4
12A4
12A4
12A4
12A4
12A4
3A4,3A4,F12.3,F12.7
12A4
3(F8.3),4(F6.3)
12A4
12A4
12A4
12A4
12A4
6A4
F14.8
2(I3,I2,F6.3, A1)
I3,I2, F6.3, A1
2(I3,I2,F6.3, A1)
2(F11.2, A1)
F12.10
2(F11.2, A1)
4(I3,I2,F6.3, A1)
I3, I2, F7.4
A1, 2I2,F6.3, A1
I3,I2,F7.4
Instrument code (I) tables
Header Records: H400-H419:code 1, H420-H439: code 2....H560-H579: code 9
Instrument code must be entered in col 33-34, for example: '1,' '2,' ... '9,'
Type
H400
H401
H402
Parameter description
Pos: 5-32
Type,Model,Polarity
Crew name,Comment
Sample int.,Record Len.
Parameters
Pos
Format
33-80
12A4
33-80
12A4
33-80
12A4
7
H403
H404
H405
H406
H407
H408
H409
H410
H411
H412
H413
H414
|
H419
Number of channels
Tape type,format,density
Filter_alias Hz,dB pnt,slope
Filter_notch Hz,-3dB points
Filter_low Hz,dB pnt,slope
Time delay FTB-SOD app Y/N
Multi component recording
Aux. channel 1 contents
Aux. channel 2 contents
Aux. channel 3 contents
Aux. channel 4 contents
Spare
Spare
33-80
33-80
33-80
33-80
33-80
33-80
33-80
33-80
33-80
33-80
33-80
33-80
|
33-80
12A4
12A4
12A4
12A4
12A4
12A4
12A4
12A4
12A4
12A4
12A4
12A4
|
12A4
Receiver code (Rx) tables
Header Records: H600-H609:code 1, H610-H619:code 2....H690-H699: code 10
Receiver code must be entered in col 33-34, examples of possible codes:
G1..to.G9 for geophones
H1..to.H9 for hydrophones
R1..to.R9 for multi comp. and other types
PM = Permanent marker
KL = Kill or omit receiver station
Type
H600
H601
H602
H603
H604
|
H609
Parameter description
Pos: 5-32
Type,model,polarity
Damp coeff,natural freq.
Nunits,len(X),width(Y)
Unit spacing X,Y
Spare
Spare
Parameters
Pos
Format
33-80
12A4
33-80
12A4
33-80
12A4
33-80
12A4
33-80
12A4
|
|
33-80
12A4
For 'PM' and 'KL' use H26 records (free format description)
Source code (Sx) tables.
Header Records: H700-H719: code 1,H720-H739: code 2...H880-H899: code 10
Source code must be entered in cols 33-34, examples of possible codes:
V1..to.V9 for vibroseis
E1..to.E9 for explosive
A1..to.A9 for air gun
W1..to.W9 for water gun
S1..to.S9 for other types
KL = Kill or omit shotpoint
Type
H700
H701
H702
H703
Parameter description
Pos: 5-32
Type,model,polarity
Size,vert. stk fold
Nunits,len(X),width(Y)
Unit spacing X,Y
Parameters
Pos
Format
33-80
12A4
33-80
12A4
33-80
12A4
33-80
12A4
8
Following records are only required if source type= Vibroseis V1..V9
H704
H705
H706
H707
H708
H709
H710
Control type
Correlator,noise supp
Sweep type,length
Sweep freq start,end
Taper,length start,end
Spare
Spare
33-80
33-80
33-80
33-80
33-80
33-80
33-80
12A4
12A4
12A4
12A4
12A4
12A4
12A4
Following records are only required if source type= Explosive E1..E9
H711
H712
H713
H714
H715
Nom. shot depth,charge len.
Nom. soil,drill method
Weathering thickness
Spare
Spare
33-80
33-80
33-80
33-80
33-80
12A4
12A4
12A4
12A4
12A4
Following records are only required if source type = air gun A1..A9
or = water gun W1..W9
H716
H717
H718
H719
P-P bar m,prim/bubble
Air pressure psi
No. sub arrays,Nom depth
Spare
33-80
33-80
33-80
33-80
12A4
12A4
12A4
12A4
Quality Control check records
Type
H990
H991
Parameter description
Pos: 5-32
R,S,X file quality control
Coord. status final/prov
Parameters
Pos
Format
33-60
2A4,I4,4A4
33-68
4A4,I4,4A4
9
POINT RECORD SPECIFICATION
This record type contains details at the position of the shotpoint at the time of recording or at
the position of a receiver at the time of first shotpoint recorded into the receiver.
item definition of field
1
record identification
cols
1-1
format
A1
2
line name
2-11
F10.2
3
point number
12-21
F10.2
+
4
point index
22-23
24-24
I1
*5
point code
25-26
6
static correction
7
min. to max
“S” or “R”
-999999.99 to
9999999.99
-999999.99 to
9999999.99
default
none
just.
n/a
none
right
none
right
1 to 9
blank
1
right
A2
A#
none
Left
27-30
I4
-999 to 999
blank
right
point depth
31-34
F4.1
0 to 99.9
0
right
8
seismic datum
35-38
I4
-999 to 9999
0
right
9
uphole time
39-40
I2
0 to 99
blank
right
10
water depth
41-46
F6.1
0 to 9999.9
blank
right
11
12
map grid easting
map grid northing
47-55
56-65
F9.1
F10.1
none
none
none
none
right
right
13
surface elevation
66-71
F6.1
-999.9 to 9999.9
none
right
14
day of year
72-74
I3
1 to 999
none
right
15
time “hhmmss”
75-80
3I2
000000 to 235959
none
n/a
* Example Point codes :
"PM" - permanent marker, "KL" - kill or omit point
"G1".."G9" "H1".."H9", "R1".."R9" - receiver codes
"V1".."V9" "E1".."E9", "A1".."A9","W1".."W9",
"S1".."S9". - source codes
+ For compatibility reasons cols 22-23 are left blank.
Note:
Alphanumeric (A) fields are to be left justified and
Numeric (I and F) fields are to be right justified unless specified otherwise.
10
units
blank
ms
header
defined
header
defined
ms
header
defined
header
defined
RELATION RECORD SPECIFICATION
This record type is used to define the relation between the field record number and shotpoint
and between recording channels and receiver groups. For each shotpoint there is at least one
"Relation Record". Each of these records specifies a section of consecutively numbered
channels and receiver groups. After a numbering gap or a change in line name or
repositioning for the receiver groups a new "Relation Record" has to be given. Channel
numbers should be in ascending order.
Fields 6,7 and 8 must be identical to fields 2,3 and 4 of the corresponding shotpoint
record. While the receiver line and point numbers in fields 13,14 and 15 must be the
same as used in the receiver point records.
item
1
2
3
4
5
definition of field
record identification
field tape number
field record number
field record increment
instrument code
cols
1–1
2–7
8 - 15
16 - 16
17 - 17
format
A1
3A2
I8
I1
A1
6
line name
18 - 27
F10.2
7
point number
28 - 37
F10.2
8
9
10
11
point index
from channel
to channel
channel increment
38 – 38
39 - 43
44 - 48
49 - 49
I1
I5
I5
I1
12
line name
50 - 59
F10.2
13
from receiver
60 - 69
F10.2
14
to receiver
70 - 79
F10.2
15
receiver index
80 -80
I1
min. to max
"X"
free
0 to 16777216
1 to 9
1 to 9
-999999.99 to
9999999.99
-999999.99 to
9999999.99
1 to 9
1 to 99999
1 to 99999
1 to 9
-999999.99 to
9999999.99
-999999.99 to
9999999.99
-999999.99 to
9999999.99
1 to 9
Note
Alphanumeric (A) fields are to be left justified and
Numeric (I and F) fields are to be right justified unless specified otherwise.
11
default
none
none
none
1
1
just.
n/a
right
right
right
right
none
right
none
right
1
none
none
1
right
right
right
right
none
right
none
right
none
right
1
right
COMMENT RECORD SPECIFICATION (Optional)
This record type is used for comments, for example to flag bad/noisy traces per record, test
file details and another supplementary information normally given in the observers report.
____________________________________________________________________
Item Definition of field
Cols Format Min.to Max. Default Units
____________________________________________________________________
1
Record identification
1-1
A1
"C"
None ____________________________________________________________________
2
Comment
2-80 79A1 Free
Blank ____________________________________________________________________
12
HEADER RECORD DESCRIPTION
The text in bold type face are the parameter descriptions to be entered, left justified, into
positions 5-32. The text in italics are examples of parameters to be entered, left justified, into
positions 33-80. Positions 33 and 34 must always contain the instrument or receiver or source
code. To enable parsing of free format (12A4) parameter fields the following rule should be
used "The parameters entered into positions 33-80 must be separated by a comma and the
parameter string must be terminated by a semi colon. Parameter text cannot contain commas
',' or semi colons';' ".
N.B. All units of distance are in meters except the grid coordinates whose units are defined
by H20 and can be converted to meters using the conversion factor defined by H201.
H00
SPS format version num The format version number should be in this format.
Example: SPS 2.1;
H01
Description of survey area The name of the country, survey area, survey type (land:
L2D/L3D or Transition zone: TZ2D/TZ3D) and project number.
Example: The Netherlands,Dordrecht,L3D,0090GA;
H02
Date of survey The date of recording first shotpoint of survey and the last date of
survey on this file. Example: 21.05.1990,28.051990;
H021 Post-plot date of issue The date when this tape or disc was issued and confirmed
checked. Example: 30.05.90;
H022 Tape/disk identifier Example: 0090GA0;
H023 Line sequence number The line sequence number allows more than one production
line per tape as long as a unique combination of field file number and line sequence
number are used per storage unit. Example:5;
H03
Client The client's company name. Example: NAM;
H04
Geophysical contractor The company name of the main seismic contractor, and the
seismic party name. Example: Prakla Seismos,SON 1;
H05
Positioning contractor The company name of contractor or sub-contractor
responsible for the positioning/survey control in the field.
Example: Prakla Seismos,
H06
Pos. proc. contractor The company name of contractor or sub-contractor responsible
for the post processing of the positioning data.
Example: Prakla Seismos,SON 1;
H07
Field computer system(s) The acquisition management system name, name of
seismic recording instrument, and the method of direct transfer to/from the seismic
recording instrument (if no direct transfer enter "manual entry").
Examples: CDB,SN368/FLUKE,FDOS discs; or None,SN368,manual entry;
13
H08
Coordinate location The description of what the coordinates refer to.
Example: centre of source pattern and centre of receiver pattern;
H09
Offset to coord. location The offset from a vessel or vehicle reference position to
coordinate location as defined in H08, including method of angular offset used.
Example: 170M,180DEG from vessel gyro heading;
H10
Clock time w.r.t. GMT The number of hours that the local (clock) time is behind or
ahead of GMT. Examples:+2; or -6; or 0;
H11
Spare
H12
Geodetic datum,-spheroid Datum name, spheroid name, semi major axis (a), inverse
flattening (l/f) as used for survey.
Example: RD datum Bessel 1841 6377397.155 299.15281
H13
Spare
H14
Geodetic datum parameters Datum transformation parameters to WGS84
(dx,dy,dz,rx,ry,rz,ds) as used for survey. Example: 595.000 11.300 478.900 0.000
0.000 0.000 0.000
The datum transformation parameters are defined by the following model:
x
y
z
=
(2)
dx
dy
dz
+ |scale| *
1 -rz +ry
+rz 1 -rx
-ry +rx 1
*
x
y
z
(l)
where: x,y,z are the geocentric cartesian coordinates in meters dx,dy,dz are
translation parameters in meters rx,ry,rz are clockwise rotations defined in arcsecs,
but converted to radians for use in the formula. Scale is [l+ds(l0E-6)], where ds is in
parts per million.
For this example (l) is RD datum, (2) is WGS84 datum.
H15
Spare
H16
Spare
H17
Vertical datum description Name, type (i.e. equipotential, LAT or spheroidal),
origin (name or lat,long) and undulation of vertical datum with respect to WGS84.
Examples:
NAP, Equipotential, Amsterdam, 0; or
MSL-Syria, Equipotential, 34 degr N, 38 degr E, 23.6m;
H18
Projection type Type of map projection used. Example: Transverse Mercator;
Hl9
Projection zone Zone and hemisphere for UTM projections.
Example: Zone 30, North;
14
H20
Description of grid units Unit of coordinates.
Examples: Meters; or International Feet; or Indian Feet; or American Feet;
H201
Factor to meter The multiplication factor to convert grid units to meters. For
American Feet the factor is Examples: 0.30480061
H210
Lat. of standard parallel(s) Latitude of standard parallel(s) as required for projection
as per H18, in dddmmss.sss N/S. For 2 standard parallels of 5 degr N and 10 degr N.
Example: 0050000.0000100000.000N
H220
Long. of central meridian Longitude of central meridian as required for projection
as per H18 above, in dddmmss.sss E/W. For 15 degr 30 min.
Example: 0153000.000E
H231
Grid origin Latitude and longitude of the grid origin in dddmmss.sss N/S
dddmmss.sss E/W. For 5 degr N and 15 degr 10 min and 25 sec.
Example: 0050000.000N0151025.000E
H232
Grid coord. at origin Grid coordinates (Eastings and Northings) at the origin of the
projection system. For false Easting of 500000 and false Northing of 0. Example:
50000000.0E
0.00N
H241
Scale factor Scale factor for defined projection.
Example: 0.9996000000
H242
Lat., Long. scale factor Latitude and longitude at which the scale factor (H241) is
defined. Example: 0050000.000N 151025.000E
H256
Lat., Long. initial line The two points defining the initial line of projection, as latl,
longl, lat2, long2. For 5 degr N, 20 degr E, 10 degr N, 30 degr E.
Example:0050000.000N0200000.000E0100000.000N0300000.000E
H257
Circular bearing of H256 This is the true bearing to the east in the origin of the
initial line of projection in dddmmss.ssss (max of 360 degrees).
Example: 1200000.0000
H258
Quadrant bearing of H256 Quadrant bearing of the initial line of projection in N/S
ddmmss.sss E/W. Example: S300000.000E
H259
Angle from skew The angle between the skew and the rectified (North oriented) grid,
in dddmmsss.ssss. Example: 0883000.0000
H26
Free format in positions 5-80 Any other information can be included using header
records of this type.
H30
Project code and description A six character code, the survey area name and survey
type (see H01) Example: 0090GA,Dordrecht ,L3D;
15
H31
Line number format (Obsolete) Specifies the internal format of the line number
field in the data records. The specification shall beNAME1(POS1:LEN1),NAME2(POS2:LEN2),NAME3(POS3:LEN3);
Where NAMEn is the name of the sub-identifier, POSn is the first character position
within the line number field and LENn is the length of the sub field.
Example: BLOCK(1:4),STRIP(5:4),LINE NUMBER(9:8);
If no sub division of the field is required then enter 'LINE NUMBER(1:16);'
Seismic instrument header records
The user must define the set of code definitions for surveys, areas and vintages. Header record
types H400-H419 are to be used to define tables for the first instrument code, and H420-H439
for the second up to H560-H579 for the ninth code. A new table must be defined, with a
different code, for each instrument used or if any parameter in the table is changed.
The instrument code must always be in col 33-34, for example '1,' to '9,'
H400 Type,Model,Polarity The type and model name of seismic recording instrument, the
unique model number of the instrument and the polarity defined as SEG or NON
SEG. The definition of SEG is "A compression shall be recorded as a negative
number on tape and displayed as a downward deflection on monitor records".
Example: 1,SN368+LXU,12345,SEG;
H401 Crew name,Comment The name of the crew and any other comments.
Example: 1,Prakla SON 1;
H402 Sample int.,Record Length The recording sample rate and the record length on tape.
Example: 1,2MSEC,6SEC;
H403 Number of channels The number of channel per record.
Example: 1,480;
H404 Tape type,format,density The type of tape (9track or cartridge), recording format of
the data on tape and the recording density.
Example: 1,9 track,SEGD,6250;
H405 Filter_alias Hz,dB pnt,slope The anti alias or high cut filter setting of the recording
instrument or field boxes specified in hertz, the dB level at the frequency value and
the filter slope in dB per octave.
Example: 177HZ,-6DB,72 DB/OCT;
H406 Filter_notch Hz,-3dB points The centre frequency of the notch filter setting of the
recording instrument or field boxes sepcified in hertz and the frequency values at the 3dB points.
Examples: 1,NONE; or 1,50,45,55;
H407 Filter_low Hz,dB pnt,slope The low cut filter setting of the recording instrument or
field boxes specified in hertz, the dB level at the frequency value and the filter slope
in dB per octave.
Examples: 1,NONE; or 1,8HZ,-3DB,18 DB/OCT;
16
H408 Time delay,FTB-SOD app Y/N The value of any time delay and if the delay
between field time break and start of data has been applied to the seismic data
recorded on tape. Example: 1,0 Msec,not applied;
H409 Multi component recording Describes the components being recorded and their
recording order on consecutive channels, allowed values are'X','Y','Z'.
Examples: 1,Z; or 1,Z,X,Y;
H410 Aux. channel 1 contents Describes the contents of a auxilliary channel
Examples: 1,FTB; or 1,NONE;
H411
H412
H413
H414
Aux. channel 2 contents
Aux. channel 3 contents
Aux. channel 4 contents
Spare
|
H419 Spare
Seismic receiver header records
The user must define the set of code definitions for surveys, areas and vintages. Header record
types H600-H609 are to be used to define tables for the first receiver code, and H610-H619
for the second up to H690-699 for the tenth code. A new table must be defined, with a
different code, for each receiver type used or if any parameter in the table is changed.
The receiver code must always be in col 33-34, examples of possible codes:
G1..to.G9 for geophones
H1..to.H9 for hydrophones
R1..to.R9 for multi comp. and other types
PM = Permanent marker
KL = Kill or omit receiver station
H600 Type,model,polarity The type (land geophone, marsh geophone, hydrophone),
model name of seismic detector and the polarity defined as SEG or NON SEG. The
definition of SEG is "A compression shall be recorded as a negative number on tape
and displayed as a downward deflection on monitor records". Example: G1,SM4,1234,SEG;
H601 Damping coeff,natural freq. Example: G1,0.68,10Hz;
H602 Nunits,len(X),width(Y) The number of elements in the receiver group, the in-line
and the cross-line dimension of the receiver group pattern.
Example: G1,12,25M,6M;
H603 Unit spacing X,Y The distance between each element of the receiver group, in-line
(X), and cross-line (Y). Example: G1,4M,6M;
H604 Spare
|
H609 Spare
17
Seismic source header records
The user must define the set of code definitions for surveys, areas and vintages. Header record
types H700-H719 are to be used to define tables for the first source code, and H720-H739 for
the second up to H880-899 for the tenth code. A new table must be defined, with a different
code, for each source type used or if any parameter in the table is changed.
The source code must always be in col 33-34, examples of possible codes:
V1..to.V9 for vibroseis
E1..to.E9 for explosive
A1..to.A9 for air gun W1..to.W9 for water gun
S1..to.S9 for other types.
KL = Kill or omit shotpoint
H700
Type,model,polarity Source type (explosive,air gun etc), make or model, and the
polarity defined as SEG or NON SEG. The definition of SEG is "A compression shall
be recorded as a negative number on tape and displayed as a downward deflection on
monitor records".
Examples: E1,EXPLOSIVE,SEISMOGEL 125gram,SEG; or
V1,VIBROSEIS,METRZ 22,SEG EQU;
H701 Size,vert. stk fold The total charge size, force or air volume of the source pattern, the
vertical fold of stack or number of sweeps per VP.
Examples: E1,1000 gram,1; or V1,93 kN,1 SWEEP/VP;
H702 Nunits,len(X),width(Y) The number of elements in the source pattern, the in-line and
the cross-line dimension of the source pattern.
Examples: E1,6,25M,0M; or V1,4 VIBS,25M,45M;
H703 Unit spacing X,Y The distance between each element of the source pattern, in-line
(X), and cross-line (Y). Examples: E1,5M,0; or V1,8M,15M;
Following records are only required if source type= Vibroseis V1..V9
H704 Control type The type of control used.
Example: V1,GND FORCE PHASE&AMPL LOCK;
H705 Correlator,noise supp The type of correlator/stacker, and the type of noise
suppression applied before summing.
Example: V1,SERCELCS-2502,NO NOISE SUPP;
H706 Sweep type,length The type and length of the sweep.
Example: V1,LINEAR,30 SECONDS;
H707 Sweep freq start,end
Example: V1,5HZ,60HZ;
The
start
and
end
frequency
of
the
sweep.
H708 Taper,length start,end The type of taper and the taper length (start and end).
Example: V1,COSINE,500MSEC,500MSEC;
H709 Spare
18
H710 Spare
Following records are only required if source type= Explosive E1..E9
H711 Nom. shot depth,charge len. The nominal shot depth, and the length of the charge.
Example: E1,15M,1M;
H712 Nom. soil,drill method The nominal type of soil or near surface medium, and the
method of drilling (flushing,hand auger,portable drill unit etc).
Example: E1,CLAY,PORTABLE UNITS;
H713 Weathering thickness The nominal depth to the base of weathered layer.
Example: E1,8-12M;
H714 Spare
H715 Spare
Following records are only required if source type =
air gun A1..A9
water gun W1..W9
H716 P-P bar m,prim/bubble The Peak-peak output in bar meters, and the primary to
bubble ratio measured through a 0-125Hz filter at a depth of 6 meters.
Example: A1,50,13:1;
H717 Air pressure psi The nominal operating air pressure. Example: A1,2000PSI;
H718 No. sub arrays,nom depth The number of sub arrays and the nominal towing depth.
Example: A1,3,5.5M;
H719 Spare
Quality Control check records
H990 R,S,X file quality control The Date and time of the Q.C. check, and the name of the
person who performed the quality control of the file.
Example: 01JUN90,0930,Mr J Smith;
H991 Coord. status final/prov The status of the coordinates contained in the R and S files
final or provisional), the date and time of the status, the name of the surveyor
responsible for the coordinate integrity.
Example: Final,01jun90,0930,Mr J. Jansen;
19
POINT RECORD DESCRIPTION
2
Line name: Identifier for the shotpoint or receiver line. It is a numeric number with
the format of F10.2. If no decimal point is provided it should be taken as implied. It
can be composed of a block or strip number and a line number. The internal format of
this field must be defined in the header.
3
Point number: Identifier for the shotpoint or receiver group number defined as the
centre of the source or receiver array as staked out in the field. The value should be
read as a numeric F10.2 and be right justified.
4
Point index: Identifier for the shotpoint or receiver index.
Shotpoint: To be 1 for original shot within the grid cell denoted by fields 2 and 3, and
be incremented by 1 for each subsequent shot within the same grid cell. Exceptions:
shots to be vertically stacked (unsummed vibroseis).
Receiver: To be 1 for the original positioning of a receiver group, and be incremented
by 1 every time the receiver group is moved or repositioned, even when put back to
any previous position.
5
Point code: A shotpoint or receiver code which is defined in the header by a table that
describes the characteristics of the source or receiver group used at the point.
6
Static correction: The shotpoint or receiver static correction defined as a static time
shift in Msec. that has been computed in the field to correct any seismic recording for
the effects of elevation, weathering thickness, or weathering velocity at the point. The
correction should be with reference to the seismic datum as defined by field 8 of this
record. If no static was computed leave 'blank'.
7
Point Depth: The depth of the shotpoint source or receiver group. Header defined
units with respect to the surface down to the top of the charge or vertical receiver
array. When the surface elevation can vary with time (eg. a tidal water surface), then
for shotpoints the value should be at the time of recording, and for receivers at the
time of recording of the first shotpoint into that receiver. (see figures 3 and 4)
8
Seismic datum: Header defined units as an offset to the datum defined in header
record H17. It is +ve when above datum , -ve when below datum or zero when at
datum. If the seismic datum is equal to H17, enter zero. (see figures 3 and 4)
9
Uphole Time: Defined for a shotpoint as the vertical travel time to surface, recorded
in msec and is always positive or zero. If no uphole was recorded leave 'blank' Not
defined for receiver leave 'blank', unless a reverse uphole is taken then the shotpoint
definition applies.
10
Water depth: Header defined units of the measured (or reliably determined) height of
water surface above the sea bed or water bottom. In case the water depth varies in time
by more than one meter (eg. tidal areas) then for shotpoints the value should be at the
time of recording and for receivers at the time of recording of the first shotpoint into
that receiver. The water depth value is always positive. (see figures 3 and 4)
20
11
Map grid easting: The easting for the point, in the coordinate system defined by
header record H13.
12
Map grid northing: The northing for the point, in the coordinate system defined by
header record H13. To accommodate large TM northing values for surveys straddling
the equator, this field format has one more digit than UKOOA P1/90.
13
Surface elevation: The topographical surface with respect to the vertical datum
defined by header record H17. The surface elevation is +ve when above datum , -ve
when below datum or zero when at datum. When the surface elevation with respect to
the datum can vary with time (eg. a tidal water surface) Then for shotpoints the value
should be at the time of recording, and for receivers at the time of recording of the first
shotpoint into that receiver. (see figures 3 and 4)
14
Day of year: The julian day. For shotpoints the value should be the day of recording,
and for receivers the day of recording of the first shotpoint into that receiver. When the
survey continues into the next year, the day should keep increasing and not be reset to
zero - 1st January would then be 366 or 367.
15
Time hhmmss: The time taken from the clock of the master seismic recording
instrument. For shotpoints the value should be the time of recording, and for receivers
the time of recording of the first shotpoint into that receiver.
LAND AREAS
a
Surface Source/Recv.
c
b
Source/Recv.in water
Buried Source/Recv.
SEISMIC
DATUM [8]
TOPO
SURFACE
Water Surface
at time of
recording
[7]=[10]= 0
[10]
[13]
[7]
[13]
DATUM [H17]
Figure 3 Land elevations
21
[10]= 0
[7]
[13]
TIDAL WATERS
b
a
Bottom Reference
c
[7]
[7] =[10]
[13]
(Water Surface
above Datum)
Buried Source/Recv. Source/Recv.in water
[10] [13]
[7]
[13]
DATUM [H17]
[10]
[13]-ve
(Water Surface
below Datum)
[10]
SEISMIC DATUM [8]
Figure 4 Tidal elevations
[7] = POINT DEPTH
[10] = WATER DEPTH at time of recording
[13] = SURFACE ELEVATION w.r.t. DATUM [H17]
[x] = Item number in POINT RECORD
22
[7]
RELATION RECORD DESCRIPTION
2
Field tape number: The identifier of the data carrier (tape) on which the seismic
recording of the spread defined by this record is written. To accommodate
alphanumeric tape numbers this field is defined as 3A2 and is left justified in the field.
3
Field record number:The number of the seismic recording given by the field
instrument used to record the spread defined by this record.
4
Field record increment: The increment for the field record numbers, defined to allow
several consecutive records which recorded the same shotpoint and spread to be
defined by one 'X' record' (eg. unsummed vibroseis records).
5
Instrument code: Defined in the header by a table that describes the type, and settings
of the instrument used to record the spread defined by this record.
6
Line name: Identifier for the shotpoint line.Must be identical to field 2 of the
corresponding shotpoint record.
7
Point number: Identifier for the shotpoint number. Must be identical to field 3 of the
corresponding shotpoint record.
8
Point index: Identifier for the shotpoint index. Must be identical to field 4 of the
corresponding shotpoint record.
9
From channel: The seismic channel number as recorded in the seismic trace header
corresponding to the data from the receiver group number defined by fields 12 and 13
of this record.
10
To channel: The seismic channel number as recorded in the seismic trace header
corresponding to the data from the receiver group number defined by fields 12 and 14
of this record.
11
Channel increment: This field can be used for multi-component receivers when the
three components (Z,X and Y) for one receiver point are recorded on three consecutive
seismic channels, Then one 'X' record can define three components using a channel
increment of 3. The components and their order are defined by the instrument code.
12
Line name: Identifier for the receiver line for the range of receivers defined by fields
13 and 14 of this record. The identifier must be identical to field 2 of the receiver point
records that correspond to the same receiver line.
13
From receiver: Identifier for the receiver group number that corresponds to the From
channel number defined in field 9. The identifier must be identical to field 3 of the
receiver point record that corresponds to the same receiver group.
14
To receiver: Identifier for the receiver group number that corresponds to the To
channel number defined in field 10. The identifier must be identical to field 3 of the
receiver point record that corresponds to the same receiver group.
23
15
Receiver index: The receiver index value for the range of receivers defined by fields
12,13 and 14 of this record. The combination of fields 12,13,15 and 12,14,15 must
correspond to the same range of receivers as defined by records in the receiver point
file.
24
APPENDIX 1 - EXAMPLE OF SPS FORMAT
(files shown for example only-not necessarily complete)
R FILE
H00 SPS format version number
SPS 2.1;
H01 Description of survey area Area A, Sparse 3-D, EXPLORATION;
H02 Date of survey
11.01.2006,21.01.2006;
H021Post/plot date of issue
22.01.2006;
H022Tape/disk identifier
B79437-B79503;
H03 Client
SEG;
H04 Geophysical contractor
Contractor A;
H05 Positioning contractor
Contractor A;
H06 Pos. proc. contractor
Contractor A;
H07 Field computer system(s)
Sercel SN 408CMXL;
H08 Coordinate location
CENTRE OF SOURCE AND RECEIVER PATTERNS;
H09 Offset from coord. location 000M,000DEG;
H10 Clock time w.r.t. GMT
+3;
H11 Spare
;
H12 Geodetic datum,-spheroid
INTERNATIONAL
6378388.000 297.0000000
H13 Spare
;
H14 Geodetic datum parameters
-179.466-207.757 -54.446-2.598 0.287 0.843-1.000
H26 H14 are datum transformation parameters to WGS84
H15 Spare
;
H16 Spare
;
H17 Vertical datum description MSL - mean sea level;
H18 Projection type
UTM;
H19 Projection zone
Zone 39, N;
H20 Description of grid units
METERS;
H201Factor to meter
1.00000000
H220Long. of central meridian
0510000.000E;
H231Grid origin
0000000.000N0510000.000E;
H232Grid coord. at origin
00500000.00E00000000.00N;
H241Scale factor
0.9996000000;
H242Lat., long. scale factor
0000000.000N0510000.000E;
H30 Project code and descriptionArea A, Sparse 3-D,3D;
H400Type,Model,Polarity
1, Sercel,SN 408CMXL,SEG;
H401Crew name,Comment
1, S-51, Chief Ob. GAO Yu;
H402Sample int.,Record Len.
1, 2msec, 6000msec;
H403Number of channels
1, 1920;
H404Tape type,format, density
1, cartridge 3590, Code 8058, 38000 bpi;
H405Filter_alias Hz,dB pnt,slope1, 200Hz,-3dB, 370.00;
H406Filter_notch Hz,-3dB points 1, NONE;
H407Filter_low Hz,dB pnt,slope 1, NONE;
H408Time delay FTB-SOD app Y/N 1, 0 MSEC, not applied;
H409Multi component recording
1, Z;
H410Aux. channel 1 contents
1, autocorrelation of true reference delayed 1s;
H411Aux. channel 2 contents
1, autocorrelation of true reference delayed 1s;
H412Aux. channel 3 contents
1, true reference;
H413Aux. channel 4 contents
1, return reference;
H414Spare
;
H415SPare
;
H416Spare
;
H417Spare
;
H26 SPS SEISMIC RECEIVER HEADER RECORDS;
H26 DESCRIPTION OF RECEIVER CODEG1 (NORMAL GEOPHONE);
H26
;
H600Type,model,polarity
G1, Sensor, SM-24, SEG;
H601Damp coeff,natural freq.
G1, 0.685, 10Hz;
H602Nunits,len(X),width(Y)
G1, 36, 25.00m, 55.00m;
H603Unit spacing X,Y
G1, 5m, 5m;
H604Spare
;
H605Spare
;
H606Spare
;
H607Spare
;
H26 Description G1
G1, SAND, GRAVEL PLAIN, NORMAL PATTERN;
H26 DESCRIPTION OF RECEIVER CODEG2 (COMPRESSED GEOPHONE);
H610Type,model,polarity
G2, Sensor, SM-24, SEG;
H611Damp coeff,natural freq.
G2, 0.685, 10Hz;
H612Nunits,len(X),width(Y)
G2, 36, 20.00m, 55.00m;
H613Unit spacing X,Y
G2, 5m, 5m;
H614Description G2
G2, SAND, GRAVEL PLAIN, COMPRESSED PATTERN;
H615Spare
;
H616Spare
;
25
H617Spare
;
H618Spare
;
H619Spare
;
H26 DESCRIPTION OF RECEIVER CODEG3 (BUNCHED GEOPHONE);
H620Type,model,polarity
G3, Sensor, SM-24, SEG;
H621Damp coeff,natural freq.
G3, 0.685, 10Hz;
H622Nunits,len(X),width(Y)
G3, 36, 0.00m, 25.00m;
H623Unit spacing X,Y
G3, 0m, 0m;
H624Description G3
G3, SAND, GRAVEL PLAIN, BUNCHED PATTERN;
H625Spare
;
H626Spare
;
H627Spare
;
H628Spare
;
H629Spare
;
H26 SPS SEISMIC SOURCE HEADER RECORDS;
H26 DESCRIPTION OF SOURCE CODE V6 (VIBROSEIS),PARALLELOGRAM PATTERN;
H26 GRAVEL PLAIN:
;
H800Type,model,polarity
V6, VIBROSEIS,VE432,SEG;
H801Size,vert. stk fold
V6, 70% of peak force, 1 SWEEP /VIBRATOR/VP;
H802Nunits,len(X),width(Y)
V6, 5 VIBS, 48M, 0M;
H803Unit spacing X,Y
V6, 12M, 0M;
H804Control type
V6, GNDFORCE;
H805Correlator,noise supp
V6, 408CMXL, NO NOISE SUPP;
H806Sweep type,length
V6, LINEAR UPSWEEP, 12sec;
H807Sweep freq start,end
V6, 4HZ, 84HZ;
H808Taper,length start,end
V6, COSINE, 1000MSEC, 1000MSEC;
H809Spare
V6, All points on high side of median line;
H810Spare
;
H820Type,model,polarity
V7, VIBROSEIS,VE432,SEG;
H821Size,vert. stk fold
V7, 70% of peak force, 1 SWEEP /VIBRATOR/VP;
H822Nunits,len(X),width(Y)
V7, 5 VIBS, 48M, 0M;
H823Unit spacing X,Y
V7, 12M, 0M;
H824Control type
V7, GNDFORCE;
H825Correlator,noise supp
V7, 408CMXL, NO NOISE SUPP;
H826Sweep type,length
V7, LINEAR UPSWEEP, 12sec;
H827Sweep freq start,end
V7, 4HZ, 84HZ;
H828Taper,length start,end
V7, COSINE, 1000MSEC, 1000MSEC;
H829Spare
V7, All points on low side of median line;
H830Spare
;
H840Type,model,polarity
V8, VIBROSEIS,VE432,SEG;
H841Size,vert. stk fold
V8, 70% of peak force, 1 SWEEP /VIBRATOR/VP;
H842Nunits,len(X),width(Y)
V8, 5 VIBS, 48M, 0M;
H843Unit spacing X,Y
V8, 12M, 0M;
H844Control type
V8, GNDFORCE;
H845Correlator,noise supp
V8, 408CMXL, NO NOISE SUPP;
H846Sweep type,length
V8, LINEAR UPSWEEP, 12sec;
H847Sweep freq start,end
V8, 4HZ, 84HZ;
H848Taper,length start,end
V8, COSINE, 1000MSEC, 1000MSEC;
H849Spare
V8, All points on secordary source lines;
H850Spare
;
H26 Percentage hold down weight 70% of peak force;
H990R,S,X file quality control 22/Jan/06,0930,Party Manager;
H991Coord. status final/prov
Final,22/Jan/06,1600,Party Manager;
H26
1
2
3
4
5
6
7
8
H26 5678901234567890123456789012345678901234567890123456789012345678901234567890
R
5646.00 534450.00 1G1
0.0
238510.1 3058380.0 85.2 18213250
R
5646.00 534500.00 1G1
0.0
238540.0 3058380.0 84.3 18213250
R
5646.00 534550.00 1G1
0.0
238570.0 3058380.0 83.2 18213101
R
5646.00 534600.00 1G1
0.0
238600.0 3058380.0 82.4 18213101
R
5646.00 534650.00 1G1
0.0
238630.0 3058380.0 82.0 18212717
R
5646.00 534700.00 1G1
0.0
238660.0 3058380.0 81.9 18212717
R
5646.00 534750.00 1G1
0.0
238690.0 3058380.0 81.5 18212457
R
5646.00 534800.00 1G1
0.0
238720.0 3058380.0 81.8 18212457
R
5646.00 534850.00 1G1
0.0
238750.0 3058380.0 82.4 18212328
R
5646.00 534900.00 1G1
0.0
238780.0 3058379.9 81.4 18212328
R
5646.00 534950.00 1G1
0.0
238810.0 3058380.0 80.7 18212206
R
5646.00 535000.00 1G1
0.0
238840.0 3058380.0 79.6 18212206
R
5646.00 535050.00 1G1
0.0
238870.0 3058380.0 79.3 18212043
R
5646.00 535100.00 1G1
0.0
238900.0 3058380.0 78.9 18212043
R
5646.00 535150.00 1G1
0.0
238930.0 3058380.0 78.3 18211926
R
5646.00 535200.00 1G1
0.0
238960.0 3058380.0 77.9 18154555
R
5646.00 535250.00 1G1
0.0
238990.0 3058380.0 76.7 18154442
R
5646.00 535300.00 1G1
0.0
239020.0 3058380.0 75.9 18154442
R
5646.00 535350.00 1G1
0.0
239050.1 3058380.0 75.3 18154442
R
5646.00 535400.00 1G1
0.0
239080.0 3058380.0 75.3 18154442
R
5646.00 535450.00 1G1
0.0
239110.0 3058380.0 75.3 18154442
R
5646.00 535500.00 1G1
0.0
239140.0 3058380.0 75.4 18154442
26
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
5646.00
5646.00
5646.00
5646.00
5646.00
5646.00
5646.00
5646.00
5646.00
5646.00
5646.00
5646.00
5646.00
5646.00
5646.00
5646.00
5646.00
5646.00
5646.00
5646.00
5646.00
5646.00
5646.00
5646.00
5646.00
535550.00
535600.00
535650.00
535700.00
535750.00
535800.00
535850.00
535900.00
535950.00
536000.00
536050.00
536100.00
536150.00
536200.00
536250.00
536300.00
536350.00
536400.00
536450.00
536500.00
536550.00
536600.00
536650.00
536700.00
536750.00
1G1
1G1
1G1
1G1
1G1
1G1
1G1
1G1
1G1
1G1
1G1
1G1
1G1
1G1
1G1
1G1
1G1
1G1
1G1
1G1
1G1
1G1
1G1
1G1
1G1
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
239170.0
239200.0
239230.0
239260.0
239290.0
239320.0
239350.0
239380.0
239410.0
239440.0
239470.0
239500.1
239530.0
239560.0
239590.0
239620.0
239650.0
239680.0
239710.0
239740.0
239770.0
239800.0
239830.0
239860.0
239890.0
27
3058380.0
3058380.0
3058380.0
3058380.0
3058380.0
3058380.0
3058380.0
3058380.0
3058380.0
3058380.0
3058380.0
3058380.0
3058380.0
3058380.0
3058380.0
3058380.0
3058380.0
3058380.0
3058380.0
3058380.0
3058380.0
3058380.0
3058380.0
3058380.0
3058380.0
75.5
75.7
76.8
77.7
78.5
78.9
79.0
78.9
80.1
78.1
76.5
74.6
73.1
72.1
71.4
70.5
70.1
68.6
67.1
66.3
65.9
65.8
64.9
64.8
63.7
18154442
18154442
18154442
18154442
18154442
18154442
18154442
18152739
18152615
18152615
18151242
18151242
18151242
18151242
18151114
18151114
18151015
18151015
18144415
18144415
18144234
18144234
18144125
18144125
18142825
S FILE
H00 SPS format version number
SPS 2.1;
H01 Description of survey area Area A, Sparse 3-D, EXPLORATION;
H02 Date of survey
19.01.2006,21.01.2006;
H021Post/plot date of issue
22.01.2006;
H022Tape/disk identifier
B79480;
H023Line sequence number
5;
H03 Client
SEG;
H04 Geophysical contractor
Contractor A;
H05 Positioning contractor
Contractor A;
H06 Pos. proc. contractor
Contractor A;
H07 Field computer system(s)
Sercel SN 408CMXL;
H08 Coordinate location
CENTRE OF SOURCE AND RECEIVER PATTERNS;
H09 Offset from coord. location 000M,000DEG;
H10 Clock time w.r.t. GMT
+3;
H11 Spare
;
H12 Geodetic datum,-spheroid
INTERNATIONAL
6378388.000 297.0000000
H13 Spare
;
H14 Geodetic datum parameters
-179.466-207.757 -54.446-2.598 0.287 0.843-1.000
H26 H14 are datum transformation parameters to WGS84
H15 Spare
;
H16 Spare
;
H17 Vertical datum description MSL - mean sea level;
H18 Projection type
UTM;
H19 Projection zone
Zone 39, N;
H20 Description of grid units
METERS;
H201Factor to meter
1.00000000
H220Long. of central meridian
0510000.000E;
H231Grid origin
0000000.000N0510000.000E;
H232Grid coord. at origin
00500000.00E00000000.00N;
H241Scale factor
0.9996000000;
H242Lat., long. scale factor
0000000.000N0510000.000E;
H30 Project code and descriptionArea A, Sparse 3-D,3D;
H400Type,Model,Polarity
1, Sercel,SN 408CMXL,SEG;
H401Crew name,Comment
1, S-51, Chief Ob. GAO Yu;
H402Sample int.,Record Len.
1, 2msec, 6000msec;
H403Number of channels
1, 1920;
H404Tape type,format, density
1, cartridge 3590, Code 8058, 38000 bpi;
H405Filter_alias Hz,dB pnt,slope1, 200Hz,-3dB, 370.00;
H406Filter_notch Hz,-3dB points 1, NONE;
H407Filter_low Hz,dB pnt,slope 1, NONE;
H408Time delay FTB-SOD app Y/N 1, 0 MSEC, not applied;
H409Multi component recording
1, Z;
H410Aux. channel 1 contents
1, autocorrelation of true reference delayed 1s;
H411Aux. channel 2 contents
1, autocorrelation of true reference delayed 1s;
H412Aux. channel 3 contents
1, true reference;
H413Aux. channel 4 contents
1, return reference;
H414Spare
;
H415SPare
;
H416Spare
;
H417Spare
;
H26 SPS SEISMIC RECEIVER HEADER RECORDS;
H26 DESCRIPTION OF RECEIVER CODEG1 (NORMAL GEOPHONE);
H26
;
H600Type,model,polarity
G1, Sensor, SM-24, SEG;
H601Damp coeff,natural freq.
G1, 0.685, 10Hz;
H602Nunits,len(X),width(Y)
G1, 36, 25.00m, 55.00m;
H603Unit spacing X,Y
G1, 5m, 5m;
H604Spare
;
H605Spare
;
H606Spare
;
H607Spare
;
H26 Description G1
G1, SAND, GRAVEL PLAIN, NORMAL PATTERN;
H26 DESCRIPTION OF RECEIVER CODEG2 (COMPRESSED GEOPHONE);
H610Type,model,polarity
G2, Sensor, SM-24, SEG;
H611Damp coeff,natural freq.
G2, 0.685, 10Hz;
H612Nunits,len(X),width(Y)
G2, 36, 20.00m, 55.00m;
H613Unit spacing X,Y
G2, 5m, 5m;
H614Description G2
G2, SAND, GRAVEL PLAIN, COMPRESSED PATTERN;
H615Spare
;
H616Spare
;
H617Spare
;
H618Spare
;
H619Spare
;
H26 DESCRIPTION OF RECEIVER CODEG3 (BUNCHED GEOPHONE);
28
H620Type,model,polarity
G3, Sensor, SM-24, SEG;
H621Damp coeff,natural freq.
G3, 0.685, 10Hz;
H622Nunits,len(X),width(Y)
G3, 36, 0.00m, 25.00m;
H623Unit spacing X,Y
G3, 0m, 0m;
H624Description G3
G3, SAND, GRAVEL PLAIN, BUNCHED PATTERN;
H625Spare
;
H626Spare
;
H627Spare
;
H628Spare
;
H629Spare
;
H26 SPS SEISMIC SOURCE HEADER RECORDS;
H26 DESCRIPTION OF SOURCE CODE V6 (VIBROSEIS),PARALLELOGRAM PATTERN;
H26 GRAVEL PLAIN:
;
H800Type,model,polarity
V6, VIBROSEIS,VE432,SEG;
H801Size,vert. stk fold
V6, 70% of peak force, 1 SWEEP /VIBRATOR/VP;
H802Nunits,len(X),width(Y)
V6, 5 VIBS, 48M, 0M;
H803Unit spacing X,Y
V6, 12M, 0M;
H804Control type
V6, GNDFORCE;
H805Correlator,noise supp
V6, 408CMXL, NO NOISE SUPP;
H806Sweep type,length
V6, LINEAR UPSWEEP, 12sec;
H807Sweep freq start,end
V6, 4HZ, 84HZ;
H808Taper,length start,end
V6, COSINE, 1000MSEC, 1000MSEC;
H809Spare
V6, All points on high side of median line;
H810Spare
;
H820Type,model,polarity
V7, VIBROSEIS,VE432,SEG;
H821Size,vert. stk fold
V7, 70% of peak force, 1 SWEEP /VIBRATOR/VP;
H822Nunits,len(X),width(Y)
V7, 5 VIBS, 48M, 0M;
H823Unit spacing X,Y
V7, 12M, 0M;
H824Control type
V7, GNDFORCE;
H825Correlator,noise supp
V7, 408CMXL, NO NOISE SUPP;
H826Sweep type,length
V7, LINEAR UPSWEEP, 12sec;
H827Sweep freq start,end
V7, 4HZ, 84HZ;
H828Taper,length start,end
V7, COSINE, 1000MSEC, 1000MSEC;
H829Spare
V7, All points on low side of median line;
H830Spare
;
H840Type,model,polarity
V8, VIBROSEIS,VE432,SEG;
H841Size,vert. stk fold
V8, 70% of peak force, 1 SWEEP /VIBRATOR/VP;
H842Nunits,len(X),width(Y)
V8, 5 VIBS, 48M, 0M;
H843Unit spacing X,Y
V8, 12M, 0M;
H844Control type
V8, GNDFORCE;
H845Correlator,noise supp
V8, 408CMXL, NO NOISE SUPP;
H846Sweep type,length
V8, LINEAR UPSWEEP, 12sec;
H847Sweep freq start,end
V8, 4HZ, 84HZ;
H848Taper,length start,end
V8, COSINE, 1000MSEC, 1000MSEC;
H849Spare
V8, All points on secordary source lines;
H850Spare
;
H26 Percentage hold down weight 70% of peak force;
H990R,S,X file quality control 22/Jan/06,0930,Party Manager;
H991Coord. status final/prov
Final,22/Jan/06,1600, Party Manager;
H26
1
2
3
4
5
6
7
8
H26 5678901234567890123456789012345678901234567890123456789012345678901234567890
S
5713.00 542525.00 2V6
0
243355.0 3060390.0 60.6019001150
S
5603.00 542425.00 1V7
0
243295.0 3057090.0 71.1019001218
S
5601.00 542525.00 1V7
0
243355.0 3057030.0 72.7019001414
S
5715.00 542525.00 2V6
0
243355.0 3060450.0 61.0019001452
29
X FILE
H00 SPS format version number
SPS 2.1;
H01 Description of survey area Area A, Sparse 3-D, EXPLORATION;
H02 Date of survey
19.01.2006,21.01.2006;
H021Post/plot date of issue
22.01.2006;
H022Tape/disk identifier
B79480;
H023Line sequence number
5;
H03 Client
SEG;
H04 Geophysical contractor
Contractor A;
H05 Positioning contractor
Contractor A;
H06 Pos. proc. contractor
Contractor A;
H07 Field computer system(s)
Sercel SN 408CMXL;
H08 Coordinate location
CENTRE OF SOURCE AND RECEIVER PATTERNS;
H09 Offset from coord. location 000M,000DEG;
H10 Clock time w.r.t. GMT
+3;
H11 Spare
;
H12 Geodetic datum,-spheroid
INTERNATIONAL
6378388.000 297.0000000
H13 Spare
;
H14 Geodetic datum parameters
-179.466-207.757 -54.446-2.598 0.287 0.843-1.000
H26 H14 are datum transformation parameters to WGS84
H15 Spare
;
H16 Spare
;
H17 Vertical datum description MSL - mean sea level;
H18 Projection type
UTM;
H19 Projection zone
Zone 39, N;
H20 Description of grid units
METERS;
H201Factor to meter
1.00000000
H220Long. of central meridian
0510000.000E;
H231Grid origin
0000000.000N0510000.000E;
H232Grid coord. at origin
00500000.00E00000000.00N;
H241Scale factor
0.9996000000;
H242Lat., long. scale factor
0000000.000N0510000.000E;
H30 Project code and descriptionArea A, Sparse 3-D,3D;
H400Type,Model,Polarity
1, Sercel,SN 408CMXL,SEG;
H401Crew name,Comment
1, S-51, Chief Ob. GAO Yu;
H402Sample int.,Record Len.
1, 2msec, 6000msec;
H403Number of channels
1, 1920;
H404Tape type,format, density
1, cartridge 3590, Code 8058, 38000 bpi;
H405Filter_alias Hz,dB pnt,slope1, 200Hz,-3dB, 370.00;
H406Filter_notch Hz,-3dB points 1, NONE;
H407Filter_low Hz,dB pnt,slope 1, NONE;
H408Time delay FTB-SOD app Y/N 1, 0 MSEC, not applied;
H409Multi component recording
1, Z;
H410Aux. channel 1 contents
1, autocorrelation of true reference delayed 1s;
H411Aux. channel 2 contents
1, autocorrelation of true reference delayed 1s;
H412Aux. channel 3 contents
1, true reference;
H413Aux. channel 4 contents
1, return reference;
H414Spare
;
H415SPare
;
H416Spare
;
H417Spare
;
H26 SPS SEISMIC RECEIVER HEADER RECORDS;
H26 DESCRIPTION OF RECEIVER CODEG1 (NORMAL GEOPHONE);
H26
;
H600Type,model,polarity
G1, Sensor, SM-24, SEG;
H601Damp coeff,natural freq.
G1, 0.685, 10Hz;
H602Nunits,len(X),width(Y)
G1, 36, 25.00m, 55.00m;
H603Unit spacing X,Y
G1, 5m, 5m;
H604Spare
;
H605Spare
;
H606Spare
;
H607Spare
;
H26 Description G1
G1, SAND, GRAVEL PLAIN, NORMAL PATTERN;
H26 DESCRIPTION OF RECEIVER CODEG2 (COMPRESSED GEOPHONE);
H610Type,model,polarity
G2, Sensor, SM-24, SEG;
H611Damp coeff,natural freq.
G2, 0.685, 10Hz;
H612Nunits,len(X),width(Y)
G2, 36, 20.00m, 55.00m;
H613Unit spacing X,Y
G2, 5m, 5m;
H614Description G2
G2, SAND, GRAVEL PLAIN, COMPRESSED PATTERN;
H615Spare
;
H616Spare
;
H617Spare
;
H618Spare
;
H619Spare
;
30
H26 DESCRIPTION OF RECEIVER CODEG3 (BUNCHED GEOPHONE);
H620Type,model,polarity
G3, Sensor, SM-24, SEG;
H621Damp coeff,natural freq.
G3, 0.685, 10Hz;
H622Nunits,len(X),width(Y)
G3, 36, 0.00m, 25.00m;
H623Unit spacing X,Y
G3, 0m, 0m;
H624Description G3
G3, SAND, GRAVEL PLAIN, BUNCHED PATTERN;
H625Spare
;
H626Spare
;
H627Spare
;
H628Spare
;
H629Spare
;
H26 SPS SEISMIC SOURCE HEADER RECORDS;
H26 DESCRIPTION OF SOURCE CODE V6 (VIBROSEIS),PARALLELOGRAM PATTERN;
H26 GRAVEL PLAIN:
;
H800Type,model,polarity
V6, VIBROSEIS,VE432,SEG;
H801Size,vert. stk fold
V6, 70% of peak force, 1 SWEEP /VIBRATOR/VP;
H802Nunits,len(X),width(Y)
V6, 5 VIBS, 48M, 0M;
H803Unit spacing X,Y
V6, 12M, 0M;
H804Control type
V6, GNDFORCE;
H805Correlator,noise supp
V6, 408CMXL, NO NOISE SUPP;
H806Sweep type,length
V6, LINEAR UPSWEEP, 12sec;
H807Sweep freq start,end
V6, 4HZ, 84HZ;
H808Taper,length start,end
V6, COSINE, 1000MSEC, 1000MSEC;
H809Spare
V6, All points on high side of median line;
H810Spare
;
H820Type,model,polarity
V7, VIBROSEIS,VE432,SEG;
H821Size,vert. stk fold
V7, 70% of peak force, 1 SWEEP /VIBRATOR/VP;
H822Nunits,len(X),width(Y)
V7, 5 VIBS, 48M, 0M;
H823Unit spacing X,Y
V7, 12M, 0M;
H824Control type
V7, GNDFORCE;
H825Correlator,noise supp
V7, 408CMXL, NO NOISE SUPP;
H826Sweep type,length
V7, LINEAR UPSWEEP, 12sec;
H827Sweep freq start,end
V7, 4HZ, 84HZ;
H828Taper,length start,end
V7, COSINE, 1000MSEC, 1000MSEC;
H829Spare
V7, All points on low side of median line;
H830Spare
;
H840Type,model,polarity
V8, VIBROSEIS,VE432,SEG;
H841Size,vert. stk fold
V8, 70% of peak force, 1 SWEEP /VIBRATOR/VP;
H842Nunits,len(X),width(Y)
V8, 5 VIBS, 48M, 0M;
H843Unit spacing X,Y
V8, 12M, 0M;
H844Control type
V8, GNDFORCE;
H845Correlator,noise supp
V8, 408CMXL, NO NOISE SUPP;
H846Sweep type,length
V8, LINEAR UPSWEEP, 12sec;
H847Sweep freq start,end
V8, 4HZ, 84HZ;
H848Taper,length start,end
V8, COSINE, 1000MSEC, 1000MSEC;
H849Spare
V8, All points on secordary source lines;
H850Spare
;
H26 Percentage hold down weight 70% of peak force;
H990R,S,X file quality control 22/Jan/06,0930,Party Manager;
H991Coord. status final/prov
Final,22/Jan/06,1600, Party Manager;
H26
1
2
3
4
5
6
7
8
H26 5678901234567890123456789012345678901234567890123456789012345678901234567890
XB79480
111
5713.00 542525.002
1 3201
5646.00 534550.00 550500.001
XB79480
111
5713.00 542525.002 321 6401
5662.00 534550.00 550500.001
XB79480
111
5713.00 542525.002 641 9601
5678.00 534550.00 550500.001
XB79480
111
5713.00 542525.002 961 12801
5694.00 534550.00 550500.001
XB79480
111
5713.00 542525.002 1281 16001
5710.00 534550.00 550500.001
XB79480
111
5713.00 542525.002 1601 19201
5726.00 534550.00 550500.001
XB79480
211
5603.00 542425.001
1 3201
5646.00 534450.00 550400.001
XB79480
211
5603.00 542425.001 321 6401
5662.00 534450.00 550400.001
XB79480
211
5603.00 542425.001 641 9601
5678.00 534450.00 550400.001
XB79480
211
5603.00 542425.001 961 12801
5694.00 534450.00 550400.001
XB79480
211
5603.00 542425.001 1281 16001
5710.00 534450.00 550400.001
XB79480
211
5603.00 542425.001 1601 19201
5726.00 534450.00 550400.001
XB79480
311
5601.00 542525.001
1 3201
5646.00 534550.00 550500.001
XB79480
311
5601.00 542525.001 321 6401
5662.00 534550.00 550500.001
XB79480
311
5601.00 542525.001 641 9601
5678.00 534550.00 550500.001
XB79480
311
5601.00 542525.001 961 12801
5694.00 534550.00 550500.001
XB79480
311
5601.00 542525.001 1281 16001
5710.00 534550.00 550500.001
XB79480
311
5601.00 542525.001 1601 19201
5726.00 534550.00 550500.001
XB79480
411
5715.00 542525.002
1 3201
5646.00 534550.00 550500.001
XB79480
411
5715.00 542525.002 321 6401
5662.00 534550.00 550500.001
XB79480
411
5715.00 542525.002 641 9601
5678.00 534550.00 550500.001
XB79480
411
5715.00 542525.002 961 12801
5694.00 534550.00 550500.001
31
XB79480
XB79480
XB79480
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